Age categories are classifications that group individuals based on their age. Commonly used categories include children (typically ages 0-12), teenagers (ages 13-19), young adults (ages 20-35), middle-aged adults (ages 36-55), and seniors (ages 56 and older). These categories help in understanding demographic trends and tailoring services or products to specific age groups. Age categories are important in various fields, including education, healthcare, and marketing. For instance, educational programs may be designed specifically for children or teenagers, while healthcare services may focus on the needs of seniors. By recognizing these age groups, organizations can better meet the needs of different populations.